/*



class People {
    protected String id, name;

    People() {}

    People(String id, String name) {
        this.id = id;
        this.name = name;
    }

    public void setName(String name){
        this.name=name;
    }

    void say() {
        System.out.println("I'm a person. My name is " + name + ".");
    }
}

class Student extends People {
    private String sid;
    private int score;

    Student() {
        name = "Pintia Student";
    }

    Student(String id, String name, String sid, int score) {
        super(id, name);
        this.sid = sid;
        this.score = score;
    }



    void say() {
        System.out.println("I'm a student. My name is " + name + ".");
    }
}

public class First {
    public static void main(String[] args) {
        Student zs = new Student();
        zs.id = "370211X";
        zs.name = "Zhang San";
        zs.say();
        System.out.println(zs.id + ", " + zs.name);

        Student ls = new Student("330106", "Li Si", "20183001007", 98);
        ls.say();
        System.out.println(ls.id + ", " + ls.name);

        People ww = new Student();
        ww.setName("WangWu");
        ww.say();

        People zl = new People("370202", "Zhao Liu");
        zl.say();
    }
}
*/
